freesewing/packages/utils/src/measurementDiffers/index.js

import neckstimate from '../neckstimate'

// This returns how many sizes a measurement differs from the neckstimate value
//   0 and 2 is great
//   2 to 5 is hmmm
//   and above 5 is probably wrong
const measurementDiffers = (
  neckCircumference,
  measurementName,
  measurementValue,
  breasts = false
) =>
  Math.abs(
    Math.round((measurementValue - neckstimate(neckCircumference, measurementName, breasts)) / 20)
  )

export default measurementDiffers